neighbours stealing kitties is a thing we had this gorgeous almost green eyed russian kitten boy for a while, and then he had a serious accident, maybe fell on some broken glass or got bit by a big dog, and then some weeks later disappeared, but we were pretty sure he ended up about 5 doors down some neighbour took him but part of the story was, we think that his daddy prowled the area where we were (well, duh, that's how he got born from our housecat) and he just didn't want to live around there anymore russian blue cats are extremely aggressive and bold makes them lots of fun but not for their kitten boys
So sorry to hear. I love Russian Blues.
yeah little putsi... the signs were there... sometimes suddenly he'd come bolting into the lab and jump up on the desk and hide behind the computers there was a very mean big boy cat outside who terrorised him, he probably literally ran away to get away from that tom cat